[BUGFIX] Use shadow columns for move placeholders

Shadow columns must be copied to "move" placeholder also like they are
copied to "new" placeholders.

This patch obsoletes the patch for #44470 and therefore reverts commit
047b6391d856c4074b2947af12477ca35ce16491 ("[BUGFIX] Content elements
in wrong column in page module")

Resolves: #32967
Related: #44470
Releases: 6.2, 6.1, 6.0, 4.5
Change-Id: Iebaa3a3fe101b9fa231fb96d717e48e831bb676c